A sample of calcium fluoride, CaF2, contains 1.71 moles. How much does the sample weigh, in grams?
Amount of CaF2( gram) = number of moles of CaF2 X mw of CaF2 (gram/mole)
= 1.71 mole X 78.07 gram/mole (mw of CaF2)
= 133.49 grams
A sample of calcium fluoride, CaF2, contains 1.71 moles. How much does the sample weigh, in...
The solubility product of calcium fluoride (CaF2) is 3x10^-11. If water contains 250 mg/L calcium, how much fluoride will be soluble?
a sample of sulfur contains 8.84 x 10^19 atoms. how much does the sample weigh, in grams?
1. Solid calcium fluoride (CaF2) establishes the following equilibrium in solution: CaF2(s) = Ca2+(aq) + 2F-(aq) Ke = 1.5 x 10-10 A solution initially contains 2.45 g of CaF2. a. In which direction will the reaction move to reach equilibrium? Explain your reasoning b. Calculate the equilibrium concentrations of Ca2+ and F. How much CaF2 (in mg) dissolves in solution? c. Another solution initially contains 2.45 g of CaF2 and 0.0025 M NaF. What are the equilibrium concentrations of Ca2+...
Calcium fluoride, CaF2, is an insoluble salt (Ksp = 1.46 x 10-10) that can be formed by precipitation by mixing solutions of calcium nitrate and sodium fluoride. Suppose 200.0 mL of a 0.600 M Ca(NO3)2(aq) solution are mixed with 400.0 mL of a 0.0600 M NaF(aq) solution. Will a precipitate form? How much calcium fluoride could form?
how many moles of Cobalt(III) fluoride, CoF3 are present in a sample that contains 3.46 moles of fluoride ions? please do the math
B. Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitr and water vapor. How many moles of dinitrogen monoxide are produced after 16.8 g of calcium nitrate and 17.50 g of ammonium fluoride react completely? How many grams How many moles of dinitrogen monoxide are produced? C. Freon-12 (CCl2F2) is synthesized by the reaction between carbon tetrachloride and antimony(III) fluoride at a temperature slightly above room temperature. Balance the following chemical equation (Hint: Balance F first.): CCL) +...
What is the solubility of calcium fluoride, CaF2, in a solution containing 2x10-2 M of F- ions at 25 degrees C? The solubility product constant for calcium fluoride is 3.4x10-11 at 25 degrees C.
Calcium fluoride (CaF2) has a Ksp of 3.45∙10-11. If I have a 0.150 M solution of sodium fluoride, what concentration of calcium acetate will begin precipitation of the fluoride ions?
What is the solubility of CaF2 (calcium fluoride) in... a) ...pure water? b) ...0.4 M caCl2
10 L of a saturated solution of calcium fluoride, CaF2, was evaporated and found to contain 4.28 millimoles (mmol) fluoride. What is the value of Ksp? CaF2(s) -> <- ca2+ (aq) +2 F- (aq) How did Ksp= [Ca2+] [F-]2 become Ksp= [s] [2s]2= 4s3 Cause I thought it was only Ksp= [s] [s]2 = s3 and why 4.28x10-3 have to devide by 10 and why the [F-] = 4.28 x 10-4 have to eqautes to 2 to have s= 2.14x10-4...